Warp supply for circular weaving machines



Dec. 23, 1947. v. M. J. ANCET WARP SUPPLY FOR CIRCULAR WEAVING MACHINES Filed Aug. 13, 1945 14/470? NAIF/E Java A4657 "mu; m p 65.

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Patented Dec. 23, 1941,

WARP SUPPLY FOR CIRCULAR WEAVING MACHINES Victor Marie Joseph Ancet, Lyon, France, assignor to Marius Fayollc alias Marcel Fayolle, Lyon,

France Application August 13, 1945, Serial No. 610,438 In France June '7, 1945 My invention has for its object the portion of the warp supply which in a weaving machine lies ahead of the weaving members proper and which is generally termed'the rear warp supply in horizontal rectilinear looms.

My invention has for its object a special warp supply for circular weaving machines of the type wherein the warp is unwound no longer horizontally but vertically, generally upwardly i. e. wherein the warp rolls are located near the ground.

My invention covers an arrangement allowing, in such an application, the execution of a warp supply very similar in its design to those used in rectilinear horizontal looms, which have proved satisfactory since man years on a large number of looms and to which the weavers are now accustomed.

This warp supply associates two warp rollers or cylinders carried on gantries and arranged facing one another symmetrically with reference to the central axis of the loom. a

This arrangement comprising only two rollers whereas this number is generally higher in other types of circular looms, shows the advantage of being much simpler for building purposes, of a1- lowing an easier handling of the warp during the building and of being much less bulky, easier to approach, while a large space available between the two gantries provides means for housing the driving and supervising parts.

My invention has also for its object a device for braking the warp in order to provide for an absolute equality in tension between the two elementary warps adapted to form a single piece of fabric; if such equality were not obtained the shrinking produced after weaving would be different and would cause folds to appear in the fabric.

The abovementioned'cooperation between the two rollers facing one another and rotating in opposite directions allows satisfying the above requirements in a most satisfactory manner by means of a compensated mounting leading to a self-balance of the corresponding brakings. It

consists in interconnecting by means of a trac-.

tionally operating spring the cables or the like braking elements of the two rollers drums, either directly or through the agency of amplifying levers whereby, for reasons of symmetry and because of the equality between action and reaction, the braking forces which arise through the rotation of the two rollers and the adherence of the cables on their drums, balance one another permanently and remain thusalways equal.

According to a further feature of this warp 5 Claims. (Cl. 139-13) 2 su ly, each half warp executes as it passes off its roller and before it isdeflected towards the distributing member forming the circular sheath,

a rectilinear horizontal or substantially horizontal path. Said path allows equipping a circular loom with any usual type of weft stop motion provided with blades or staples and operating mechanically or preferably electrically as commonly in use on rectilinear looms.

My invention covers also different other devices of particular advantage and the whole system will be clearly understood by referring to accompanying drawings illustrating a form of execution chosen by way of example; in said drawings:

Fig. l is a diagram showing the arrangement of I two warp rollers with their self-balancing braking means. 1

Fig. 2 is a general view of the warp supply, one of the gantries however not being shown.

Fig. 3 is a perspective view of one of the two gantries with its warp roller and the various elements it comprises. V As disclosed herelnabove. the warp is subdivided into two parts a and at having equal lengt s and an equal number of threads built in identical manners on two rollers b and b There rollers are located facing one another and the unwinding of their warp is executed in the direction of the arrows :c so'that they rotate in opposite directions as illustrated by the arrows y.

On the drums c of these rollers are wound ropes or the like braking means, respectively 12 and (1 one of the ends of the ropes being connected with a stationary point e while their other ends are interconnected through a spring I (Fig. 1). It is apparent that if for any reason, the adherence increases over one of the drums, over the drum b for instance, the rope is drawn towards the latter in the direction of the arrow 2 which increases in the same proportion the braking on the other drum, to wit drum b in the example chosen, which provides for a self-balancing between the braking actions and consequently for an equal tension on the two half-warps a and a.

Fig. 2 illustrates a practical form of execution of this braking wherein the action of the spring I on the ropes d d is executed through the agency of amplifying levers g g of which the useful length may be adjusted. It is also apparent that the length of the ropes is adjustable by means of sneckets h h of the capstan type.

Each of the drums is carried by a gantry i including bars 7 and 1" adapted to deflect each half warp before it. spreads and forms a semi-tubular executed by each half warp, the latter is entirely comparable with the warp of a rectilinear loom and is thus capable of receiving a warp-stop motion of a type commonly in use for such looms such as a blade. or drapper system '11: adapted to act on an electrode bar n.

In this portion-of the warp is also inserted the usual lease of rectilinear looms.

It should be noticed that the bar a" of each gantry is located at a distance of the axis of the loom which is equal to A of the diameter of the tubular sheath so that the extreme angles a and a given to the threads with reference to the vertical at certain points of the warp may be equal, said position producing the minimum strains for such extreme threads.

As to the distributing member P, it is advantageously constituted by a plurality of elements 11 p, p, appearing as rectangular plates or annular segments of reduced length arranged in annular sequence in an easily removable manner on an annular support.

The reeding is thus made much easier as it is possible to dismantle these elements I), I). P etc. and to arrange them subsequently in a line on a table standing near the corresponding roller. These distributing elements may be designed in the shape of weaving reeds or of perforated plates.

Lastly it is obvious and it has also been stated hereinabove that my invention is by no means limited to the single form of execution described hereinabove by way of example and that it covers on the contrary all the modifications thereof falling within the scope of appended claims.

What I claim is:

1. In a circular weaving loom, a warp supply comprising two rollers facing each other and each carrying half of the warp, means for distributing each half warp in a semi-circle, braking means acting on each of said rollers, and single tension means acting on both said braking means.

2.' In a circular weaving loom, a warp supply comprising two rollers facing each other and each carrying half of the warp, means for distributing each half warp in a semi-circle. friction cables acting on said rollers and a traction spring connecting said cables.

3. A circular weaving loom according to claim 1, means interposed between each of said rollers and said distributing means for guiding said half warps along a straight horizontal path, and electric warp stop motions with drappers adapted to act on an electrode bar of the type used normally in rectilinear weaving looms inserted across said straight horizontal path.

4. A circular weaving loom according to claim 2, means interposed between each of said rollers and said distributing means for guiding said half warps along a straight horizontal path, and electric warp stop motions with drappers adapted to act on an electrode bar of the type used normally in rectilinear weaving looms inserted across said straight horizontal path.

5. A circular weaving loom according to claim 2, means interposed between each of said rollers and said distributing means for guiding said half warps along a straight horizontal path, electric warp stop motions with drappers adapted to act on an electrode bar of the type used normally in rectilinear weaving looms inserted across said straight horizontal path, and amplifying levers connectin said traction spring to said friction cables.

VICTOR MARIE JOSEPH ANCET.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 16,306 Dawley Dec. 23, 1856 51,040 Greenough Nov. 21, 1865 361,994 De Laski Apr. 26, 1887 608,676 Herold Aug, 9, 1898 1,860,975 Alon'so May 31, 1932 1,990,064 Dickie Feb. 5, 1935 2,313,300 Pelce Mar. 9, 1943 FOREIGN PATENTS Number Country Date 168,691 Great Britain Sept. 14, 1921 

